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15 cards from this deck
NDT using high-frequency sound waves to detect internal flaws
Non-destructive testing
Sound reflection and echo
Pulse
Transducer
Oscilloscope
A-scan display
Reflection from internal flaw or defect
Wave reached material's far surface
Reflects back early, cannot travel through full thickness
Initial pulse, crack echo, back surface echo
Non-destructive, component remains usable after test
Skilled operators for correct interpretation
Highly sensitive - detects very small internal flaws
Railway maintenance - inspecting rail joints and track
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